/*******************************************************************************
 * Copyright 2011 Alexandre Zglav and Morphiastic
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package com.morphiastic.analysis.filters;

import java.io.IOException;
import java.util.Map;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.xcontent.XContentBuilder;
import com.morphiastic.analysis.AnalysisComponentDefinition;
import com.morphiastic.analysis.SnowballLanguage;
import com.morphiastic.utils.EqualsUtil;
public class SnowballTokenFilter extends ElasticFilter{
	
	
	public static final String LANGUAGE_PARAM_KEY = "language";
	
	 
	private SnowballLanguage language;

	
	
	public SnowballTokenFilter(String defName){
		this(null,defName);
	}
	
	public SnowballTokenFilter(Map<String,String> params, String defName){
		
		super(ElasticFilterType.snowball, defName);
		
		if(params!=null){
			
			String languageParam = params.get(LANGUAGE_PARAM_KEY);
			if(languageParam != null && !languageParam.isEmpty()){
				try{
					this.language = SnowballLanguage.valueOf(languageParam);
				}catch (Exception e) {
				}				
			}
		}
	}
	
	@Override
	public boolean hasCustomParams() {
		 if(this.language!= null )return true;
		 return false;
	}
	
	
	@Override
	public XContentBuilder addToBuilder(XContentBuilder mappingBuilder) throws IOException {
		mappingBuilder.startObject(getDefinitionName())
		.field("type", getComponentSubTypeName());
		if(this.language != null){
			mappingBuilder.field(LANGUAGE_PARAM_KEY, this.language.toString());
		}
		return mappingBuilder;
	}
	
	
	
	
	@Override
	public void setParamsFromSettings(Settings settings) {
		String languageParam = settings.get(LANGUAGE_PARAM_KEY);
		if(languageParam != null && !languageParam.isEmpty()){
			try{
				this.language = SnowballLanguage.valueOf(languageParam);
			}catch (Exception e) {
			}				
		}
	}
	
	


	@Override
	public boolean areEquivalentDefinitions(AnalysisComponentDefinition other){
		
		if(other==null)return false;
		SnowballTokenFilter o;
		try {
			o = (SnowballTokenFilter)other;
		} catch (ClassCastException e) {
			return false;
		}
		return 
		EqualsUtil.areEqual(this.language, o.language);
	}
	
	
	
}
